package com.sky.controller.user;


import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@Api(tags = "C端-菜品浏览接口")
@RequestMapping("/user/dish")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId){
        log.info("根据分类id查询菜品:{}",categoryId);

        //构造redis中的key,规则:dish_分类id
        String key = "dish_" + categoryId;

        //查询redis中是否存在商品数据
        List<DishVO> list = (List<DishVO>)redisTemplate.opsForValue().get(key);//尝试获取数据

        if (list != null && !list.isEmpty()){
            //如果存在返回商品数据,无需访问数据库
            return Result.success(list);

        }


        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);

        //如果不存在就去数据库中查找,并将查找到的数据放入redis缓存中
        list = dishService.listWithFlavor(dish);
        redisTemplate.opsForValue().set(key,list);

        return Result.success(list);
    }

}
